Messages in this thread Patch in this message | | | Date | Mon, 14 Oct 2013 22:12:50 -0700 | From | tip-bot for Ingo Molnar <> | Subject | [tip:perf/core] tools/perf/build: Add 'autodep' functionality, generate feature test dependencies automatically |
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Commit-ID: 8b6eb56a9570001634df1d2c7f38e7179a357362 Gitweb: http://git.kernel.org/tip/8b6eb56a9570001634df1d2c7f38e7179a357362 Author: Ingo Molnar <mingo@kernel.org> AuthorDate: Mon, 30 Sep 2013 13:51:28 +0200 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 9 Oct 2013 08:48:29 +0200
tools/perf/build: Add 'autodep' functionality, generate feature test dependencies automatically
Use GCC's -MD feature to generate a dependency file for each feature test .c file, and include that .d file in the config/feature-checks/Makefile.
This allows us to do two things:
- speed up feature tests - detect removal or changes in build dependencies - including system libraries/headers
Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-Jfma8pmPnnqzpxjbs3hpgmsj@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> --- tools/perf/config/feature-checks/Makefile | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile index b3f6372..4708cca 100644 --- a/tools/perf/config/feature-checks/Makefile +++ b/tools/perf/config/feature-checks/Makefile @@ -1,16 +1,20 @@ FILES=test-hello +CC := $(CC) -MD + all: $(FILES) BUILD = $(CC) -o $(OUTPUT)$@ $@.c ############################### -test-hello: test-hello.c +test-hello: $(BUILD) +-include *.d */*.d + ############################### clean: - rm -f $(FILES) + rm -f $(FILES) *.d
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